242 U.S. NATIONAL MUSEUM BULLETIN 236 



shaped, composed of fused somites 1 and 2, Iji times as long as 

 somite 3. Line of fusion very distinct dorsally and laterally. All 

 abdominal somites are strongly telescoped and bear no spinules. 

 Anal somite fairly long, twice as long as somite 4, with broad anal 

 flap. Furcal rami diverging, slightly broader than long, structure as 

 in immatm'e specimen. Rostrum obliquely downwardly curved, 

 triangular plate with very broad base (fig. 966) and blunt apex, sepa- 

 rated from head by distinct groove. Two lateral incisions, each 

 bearing a hair, indicate position of frontal organ. Rostrum here is 

 slightly shorter than it appears to have been in Nicholls' specimen. 



Antennules very short, ji length of cephalothorax, 8-segmented, 

 setation represented in figure 966, with some slight differences from 

 Nicholls' drawing (1941, fig. 19): there is only one aesthetasc on 

 segment 4 and none on segment 3, but one of the setae here is 

 lengthened. 



Antenna (fig. 96c) short and powerful, especially allobasis, which 

 bears no internal seta but row of spiniform hairs. Exopodite 1- 

 segmented, with 3 setae. Total number of appendages on endopodite 

 7, 2 of which are geniculate setae. 



Mandible with well-developed cutting edge on praecoxa; palp 

 reduced, composed of 2 segments, the apical bearing 4 small setae. 



Praecoxal arthrite of maxillule well developed; rest of maxillule 

 reduced to form small lobe with 4 strong setae. 



Maxilla (fig. 9Qd) with only 2 endites: small coxal endite, with 

 single small seta, and larger basal endite, coalescent with strong, 

 curved spine. In addition, there is a fine seta on the basal endite. 

 Endopodite reduced and present as single fine seta. 



Maxillipede (fig. 96e) chelate, powerful. Coxa well developed, 

 with 2 setae and some spinules. Basis strongly swollen, internal and 

 external border convex, internal border haired. Endopodite composed 

 of 2 fused segments, half length of basis, curved, pointed, with 1 

 additional seta. 



Leg 1 (fig. 97a) with 2-segmented endopodite and 3-segmented exop- 

 odite. Coxa big and broad, bordered with spinules along insertion of 

 basis. Basis with big internal and external marginal spine. Exopodite 

 slightly shorter than 1st endopodal segment, segments of equal length, 

 2nd without internal seta, 3rd with total of 4 appendages. 1st 

 endopodal segment styliform, 3 times as long as wide, with short, 

 subapical internal seta. 2nd endopodal segment as long as wide, 

 with 2 strong but very unequal, hooked spines and a fine seta. 



